DIM InFile$
 '---------------------------------------------------------------------------- 
 ' CONSTANT                    MEANING 
 '---------------------------------------------------------------------------- 
 'FILE_ATTRIBUTE_ARCHIVE   -- The file is an archive file 
 'FILE_ATTRIBUTE_HIDDEN    -- The file is hidden 
 'FILE_ATTRIBUTE_NORMAL    -- The file has no other attributes set 
 'FILE_ATTRIBUTE_OFFLINE   -- The data of the file is not immediately available 
 'FILE_ATTRIBUTE_READONLY  -- The file is read-only 
 'FILE_ATTRIBUTE_SYSTEM    -- The file is part of the operating system 
 'FILE_ATTRIBUTE_TEMPORARY -- The file is being used for temporary storage 
 '---------------------------------------------------------------------------- 
 InFile$ = COMMAND$(1)
 
 SetFileAttr(InFile$, FILE_ATTRIBUTE_HIDDEN )
 
 SUB SetFileAttr(Filename$, FileAttribute%)
   SetFileAttributes(Filename$, FileAttribute%)
 END SUB

Result:

 Result not displayed for this example.